On Mon, Sep 29, 2025 at 10:53 PM Jakub Jelinek <[email protected]> wrote:
>
> On Thu, Sep 25, 2025 at 10:23:46AM +0100, Andre Vieira wrote:
> > +/* Implement TARGET_C_BITINT_TYPE_INFO
> > +   Return true if _BitInt(N) is supported and fill its details into *INFO. 
> >  */
> > +
> > +bool
> > +arm_bitint_type_info (int n, struct bitint_info *info)
> > +{
> > +  if (TARGET_BIG_END)
> > +    return false;
>
> Why?  Just that it isn't tested so far?  Big endian support in the generic
> code should be there already, s390x _BitInt works.
>
> > --- a/libgcc/config/arm/libgcc-bpabi.ver
> > +++ b/libgcc/config/arm/libgcc-bpabi.ver
> > @@ -106,3 +106,11 @@ GCC_3.5 {
> >  GCC_4.3.0 {
> >    _Unwind_Backtrace
> >  }
> > +
> > +GCC_16.0.0 {
>
> I miss
>   __mulbitint3
>   __divmodbitint4
> here, that is pretty much essential to export.
> Don't you also need %import above it from whatever was the latest
> GCC_* symver on arm?
>
> > +    __fixsfbitint
> > +    __fixdfbitint
> > +    __floatbitinthf
> > +    __floatbitintsf
> > +    __floatbitintdf
> > +}
> > diff --git a/libgcc/config/arm/t-softfp b/libgcc/config/arm/t-softfp
> > index 554ec9bc47b..68aff4de068 100644
> > --- a/libgcc/config/arm/t-softfp
> > +++ b/libgcc/config/arm/t-softfp
> > @@ -1,2 +1,4 @@
> >  softfp_wrap_start := '\#if !__ARM_ARCH_ISA_ARM && __ARM_ARCH_ISA_THUMB == 
> > 1'
> >  softfp_wrap_end := '\#endif'
> > +bitint_extras += floatbitinthf
> > +softfp_cflags := -mfp16-format=ieee
>
> Other than that LGTM but I think you want Richard/Ramana to ack it; I'd 
> suggest
> to xfail the 2 tests for arm with a PR (and CC me on that), that can be
> resolved incrementally.

I'm good with the approach to xfail + PR and get that sorted .

Still recovering from travel to be able to do this justice. I expect
to have some free time on Thursday / Friday due to public holidays
here so will get back then.

Ramana

>
>         Jakub
>

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